Called for 2 weeks, several times a day, using the same number, they've changed numbers and are now calling me using this number. They've been told repeatedly to stop and they keep calling, sometimes 5 mins after the last attempt.

I get calls from them all day as well. I called back and requested they remove my number. They said they did so let's see if they call back. My word how annoying that they call all day long. Try calling this number and ask them to remove your number from their calling list.